Duroxite® 201

The overlay material is composed of primary chromium-rich carbides and refined multiple-alloy complex carbides dispersed evenly in a ductile eutectic austenite matrix. The additional multi-alloy carbides are harder and finer than the co-existing chromium-rich carbides which interlock between large primary chromium-rich carbides in a matrix.

Key Benefits

Hardox® 450 backing withstands plastic deformation better due to its high yield strength flexing back after impact

Provides stronger support due to high hardness and better bonding properties between overlay and base steel

Better performance for impact situations than Duroxite® 200 at elevated temperatures up to 350° C (660° F), but impact resistance is best at room temperature

Typical Applications

Duroxite® 201 is widely used in many industries including mining, cement and power generation. Some specific applications include:

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Surface Hardness

Number of overlay passes

Typical surface hardness 1)

Wear Properties

Number of overlay passes

ASTM G65 – Procedure A weight loss 2)

Surface

75% depth of overlay 3)

Multiple passes

0.12 g maximum

0.12 g maximum

2) ASTM G65 is a standard test measuring sliding abrasion resistance using a dry sand / rubber wheel apparatus. ASTM G65 – Procedure A is the most severe test method.3) ASTM G65 wear test is conducted at 75% depth of the overlay materials to ensure consistently good wear resistance from top surface through to the depth of 75% of the overlay.

The microstructure of Duroxite® 201 contains primary chromium-rich carbides and refined multiple-alloy complex carbides with a typical hardness of 2500 to 3000 HK4) dispersed evenly in a ductile eutectic austenite matrix. The typical volume fraction of primary chromium-rich carbides is maintained between 30 to 40% with 7 to 10% of multi-alloy complex carbides.

4) HK is the Knoop microhardness used primarily for very brittle materials or thin sheets.